KR101029345B1 - Conductive electrodes for key pad of rubber dome type - Google Patents

Conductive electrodes for key pad of rubber dome type Download PDF

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KR101029345B1
KR101029345B1 KR1020090012290A KR20090012290A KR101029345B1 KR 101029345 B1 KR101029345 B1 KR 101029345B1 KR 1020090012290 A KR1020090012290 A KR 1020090012290A KR 20090012290 A KR20090012290 A KR 20090012290A KR 101029345 B1 KR101029345 B1 KR 101029345B1
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South Korea
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conductive electrode
layer
keypad
nickel
rubber dome
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KR1020090012290A
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Korean (ko)
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KR20100093206A (en
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정상희
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정상희
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/702—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches
    • H01H13/704—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard with contacts carried by or formed from layers in a multilayer structure, e.g. membrane switches characterised by the layers, e.g. by their material or structure
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/48—Snap-action arrangements depending upon deformation of elastic members using buckling of disc springs
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
    • H01H13/88—Processes specially adapted for manufacture of rectilinearly movable switches having a plurality of operating members associated with different sets of contacts, e.g. keyboards

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  • Push-Button Switches (AREA)

Abstract

본 발명은 러버돔 방식의 키패드용 도전성 전극에 관한 것으로서, 니켈층과; 니켈층의 상면에 적층되는 실리콘층과, 상기 니켈층과 실리콘층의 사이에 니켈층과 실리콘층을 결합하기 위한 점착층을 포함하여 이루어진 것을 특징으로 한다. 본 발명에 따르면, 도전성 전극에 러버돔 방식의 키패드 러버패드의 탄성지지대와 동일한 재질인 실리콘층을 구비함으로써 도전성 전극이 탄성지지대에 견고하게 부착되어 박리 현상없이 오랫동안 사용할 수 있는 잇점이 있다. The present invention relates to a conductive electrode for a keypad of a rubber dome type, comprising: a nickel layer; And a pressure-sensitive adhesive layer for bonding the nickel layer and the silicon layer between the nickel layer and the silicon layer stacked on the upper surface of the nickel layer. According to the present invention, the conductive electrode is provided with a silicon layer made of the same material as the elastic support of the rubber dome keypad rubber pad, so that the conductive electrode is firmly attached to the elastic support and can be used for a long time without peeling phenomenon.

러버, 돔, 키패드, 전극, 실리콘, 니켈 Rubber, dome, keypad, electrode, silicon, nickel

Description

러버돔 방식의 키패드용 도전성 전극{CONDUCTIVE ELECTRODES FOR KEY PAD OF RUBBER DOME TYPE}Conductive electrode for keypad of rubber dome method {CONDUCTIVE ELECTRODES FOR KEY PAD OF RUBBER DOME TYPE}

본 발명은 러버돔 방식의 키패드에 관한 것으로서, 특히 러버돔 방식의 키패드 러버패드의 탄성지지대에 부착하여 오랫동안 견고하게 사용할 수 있도록 된 러버돔 방식의 키패드용 도전성 전극에 관한 것이다. The present invention relates to a rubber dome type keypad, and more particularly, to a conductive electrode for a rubber dome type keypad, which is attached to an elastic support of a rubber dome type keypad rubber pad and can be used for a long time.

일반적으로, 키패드는 휴대폰과 같은 통신기기에 사용되어 신호 발생이나 여러가지 부가기능을 수행하기 위한 스위치 장치로서, 러버돔 방식이나 메탈돔 방식 등이 있다. In general, the keypad is used in a communication device, such as a mobile phone, as a switch device for performing signal generation or various additional functions, such as a rubber dome method or a metal dome method.

도1은 일반적인 러버돔 방식 키패드의 단면도로서, 크게 키탑(10), 러버패드(20) 및 인쇄회로기판(30) 등으로 구성된다. 이러한 러버돔 방식 키패드의 기능을 살펴보면, 사용자가 손가락을 키탑(10) 위에 올려놓고 아래로 압력을 가하게 되면 키탑(10)의 하면에 위치한 돌기(11)에 의해 러버패드(20)의 러버돔(21)의 내부에서 돌출 형성된 탄성지지대(22)의 단부에 부착된 도전성 전극(23)이 인쇄회로기판(30)의 접점단자(31)에 접촉되게 되고, 또한 키탑(10) 위에서 가해진 압력을 해제하게 되면 러버패드(20)의 탄성력에 의해 탄성지지대(22)가 원위치로 복귀하면서 도전성 전극(23)과 접점단자(31)의 접촉이 해제되게 된다. 1 is a cross-sectional view of a general rubber dome type keypad, and is composed of a key top 10, a rubber pad 20, a printed circuit board 30, and the like. Looking at the function of the rubber dome keypad, when the user puts a finger on the key top 10 and presses down the rubber dome 21 of the rubber pad 20 by the projection 11 located on the bottom of the key top 10 When the conductive electrode 23 attached to the end of the elastic support 22 protruding from the inside of the contact comes in contact with the contact terminal 31 of the printed circuit board 30 and releases the pressure applied on the key top 10. The elastic support 22 returns to its original position by the elastic force of the rubber pad 20, and the contact between the conductive electrode 23 and the contact terminal 31 is released.

한편, 종래에는 탄성지지대(22)의 단부에 부착하는 도전성 전극(23)으로서 일반적으로 탄소전극, 골드전극 또는 은전극 등을 사용하고 있다. 그런데, 이러한 재질로 제조된 도전성 전극(23)을 사용하게 되면 러버 재질의 탄성지지대(22)와 비교하여 물성이 상이하기 때문에 키패드를 오랫동안 반복 사용시 도전성 전극(23)이 탄성지지대(22)로부터 박리되는 문제점이 있었다. 또한, 오랫동안 키패드를 반복 사용하게 되면 도전성 전극(23)의 표면에 먼지 등의 이물질이 부착되어 접점단자(31)와의 접촉 저항값이 증가하여 접촉불량이 발생되는 문제점이 있었다. 특히, 골드 재질의 도전성 전극(23)인 경우 상대적으로 제조비용이 높을 뿐만 아니라 경질로서 도전성 전극(23)의 표면에 먼지가 잘 부착되어 접점단자(31)와의 접촉불량이 발생되는 문제점이 있었다. On the other hand, conventionally, a carbon electrode, a gold electrode, a silver electrode, or the like is used as the conductive electrode 23 attached to the end of the elastic support 22. However, when the conductive electrode 23 made of such a material is used, the physical properties are different from those of the elastic support 22 made of rubber, so that the conductive electrode 23 peels from the elastic support 22 when the keypad is used repeatedly for a long time. There was a problem. In addition, when the keypad is used repeatedly for a long time, foreign matter such as dust adheres to the surface of the conductive electrode 23, resulting in a problem of contact failure due to an increase in contact resistance with the contact terminal 31. In particular, in the case of the conductive electrode 23 made of gold, the manufacturing cost is relatively high, and as a hard material, dust adheres well to the surface of the conductive electrode 23, resulting in poor contact with the contact terminal 31.

이에 본 발명은 상기와 같은 문제점을 해결하기 위한 것으로서, 러버돔 방식의 키패드 러버패드의 탄성지지대에 부착하여 사용하되 박리 현상없이 오랫동안 견고하게 사용할 수 있으면서 인쇄회로기판의 접점단자와의 접촉불량을 방지할 수 있도록 된 러버돔 방식의 키패드용 도전성 전극을 제공하는 것이다. In order to solve the above problems, the present invention is used to attach to the elastic support of the rubber dome keypad rubber pad, but can be used for a long time without peeling phenomenon to prevent the poor contact with the contact terminal of the printed circuit board. The present invention provides a conductive electrode for a rubber dome keypad.

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상기와 같은 목적을 달성하기 위하여 본 발명에 따른 러버돔 방식의 키패드용 도전성 전극은, 니켈층과; 상기 니켈층의 상면에 적층되는 실리콘층과; 상기 니켈층과 실리콘층을 결합하기 위해 상기 니켈층과 실리콘층의 사이에 개재되는 점착층을 포함하여 이루어지고, 상기 니켈층의 하면에는 엠보싱이 형성되어 있고, 상기 실리콘층의 상면에는 엠보싱이 형성되어 있는 것을 특징으로 한다. In order to achieve the above object, a conductive electrode for a keypad of a rubber dome system according to the present invention includes a nickel layer; A silicon layer laminated on the upper surface of the nickel layer; It comprises an adhesive layer interposed between the nickel layer and the silicon layer to bond the nickel layer and the silicon layer, the lower surface of the nickel layer is formed with embossing, the upper surface of the silicon layer is formed with embossing It is characterized by that.

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본 발명에 따르면, 도전성 전극에 러버돔 방식의 키패드 러버패드의 탄성지지대와 동일한 재질인 실리콘층을 구비함으로써 도전성 전극이 탄성지지대에 견고하게 부착되어 박리 현상없이 오랫동안 사용할 수 있는 잇점이 있다. 또한, 인쇄회로기판의 접점단자에 접촉하는 도전성 전극의 니켈층 표면을 엠보싱 처리함으로써 접촉성을 향상시켜 접촉불량이 발생되는 것을 방지할 수 잇점이 있다. 또한, 실리콘과 니켈로 제조하여 골드 제조시와 비교하여 상대적으로 저렴하면서도 실리콘과 니켈을 3중 결합시킴으로써 내습성과 내마모성을 향상시킴과 동시에 니켈 금속이 가지는 도전성 등의 전기적인 특성과 가공성을 활용하여 전기를 도통시키는 다양한 형태의 전자제품에 폭넓게 적용할 수 있는 잇점이 있다. According to the present invention, the conductive electrode is provided with a silicon layer made of the same material as the elastic support of the rubber dome keypad rubber pad, so that the conductive electrode is firmly attached to the elastic support and can be used for a long time without peeling phenomenon. In addition, by embossing the surface of the nickel layer of the conductive electrode in contact with the contact terminal of the printed circuit board, there is an advantage that the contact can be prevented from occurring by improving the contactability. In addition, it is made of silicon and nickel, which is relatively inexpensive compared to gold manufacturing, but improves moisture resistance and abrasion resistance by triple bonding of silicon and nickel, and utilizes electrical properties and processability such as conductivity of nickel metal. There is an advantage that it can be widely applied to various types of electronic products that conduct electricity.

이하, 첨부된 도면을 참조하여 본 발명을 상세히 설명하기로 한다.Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

도2는 본 발명에 따른 러버돔 방식의 키패드용 도전성 전극의 단면도이다. 2 is a cross-sectional view of a conductive electrode for a rubber dome keypad according to the present invention.

도면에 도시한 바와 같이, 본 발명에 따른 러버돔 방식의 키패드용 도전성 전극은 러버패드의 러버돔의 내부에서 돌출 형성된 탄성지지대의 단부에 부착되는 것으로서, 니켈층(110), 니켈층(110)의 상면에 적층되는 실리콘층(120) 및 니켈층(110)과 실리콘층(120)의 사이에 개재되어 니켈층(110)과 실리콘층(120)을 결합하기 위한 점착층(130)을 포함하여 이루어진다. As shown in the figure, the conductive electrode for the keypad of the rubber dome method according to the present invention is attached to the end of the elastic support protruding from the rubber dome of the rubber pad, the nickel layer 110, the upper surface of the nickel layer 110 The adhesive layer 130 is formed between the silicon layer 120 and the nickel layer 110 and the silicon layer 120 that are laminated on the nickel layer 110 and the silicon layer 120.

본 발명에 따른 도전성 전극의 니켈층(110)은 인쇄회로기판의 접점단자에 접촉되는 층이고, 실리콘층(120)은 러버패드 러버돔의 내부에서 돌출 형성된 탄성지지대의 단부에 부착되는 층이다. The nickel layer 110 of the conductive electrode according to the present invention is a layer in contact with the contact terminal of the printed circuit board, the silicon layer 120 is a layer attached to the end of the elastic support protruding from the inside of the rubber pad rubber dome.

이와 같이, 본 발명의 도전성 전극은 인쇄회로기판의 접점단자에 접촉될 수있도록 도전성이 우수한 니켈층(110)을 구비하고, 탄성지지대의 단부에 견고하게 부착될 수 있도록 러버 재질의 탄성지지대와 동일한 물성의 실리콘층(120)을 구비하고 있는 것이다. As such, the conductive electrode of the present invention includes a nickel layer 110 having excellent conductivity so as to be in contact with a contact terminal of a printed circuit board, and is the same as an elastic support made of rubber so that it can be firmly attached to an end of the elastic support. It is provided with the silicon layer 120 of physical property.

이 때, 본 발명에 따른 도전성 전극은 인쇄회로기판의 접점단자와의 접촉성이 더욱 향상되도록 니켈층(110)의 하면을 엠보싱(111) 처리할 수 있다. 또한, 본 발명에 따른 도전성 전극은 탄성지지대와의 부착성이 더욱 향상되도록 실리콘층(120)의 상면을 엠보싱(121) 처리할 수 있다. At this time, the conductive electrode according to the present invention can be embossed (111) the lower surface of the nickel layer 110 to further improve the contact with the contact terminal of the printed circuit board. In addition, the conductive electrode according to the present invention may emboss 121 the upper surface of the silicon layer 120 to further improve adhesion to the elastic support.

도3은 본 발명에 따른 러버돔 방식의 키패드용 도전성 전극 제조방법을 나타내는 흐름도이다. 3 is a flowchart illustrating a method of manufacturing a conductive electrode for a rubber dome keypad according to the present invention.

도면에 도시한 바와 같이, 먼저 니켈시트의 상면에 실리콘시트와의 인장력 향상을 위해 점착액을 스프레이 도포 처리한다(S110). 즉, 니켈시트를 실리콘 등의 코팅액으로 1차 코팅 처리하는 것이다. 이 때, 상기 니켈시트의 하면은 미리 엠보싱 처리되어 있을 수 있다. As shown in the figure, first, the adhesive liquid is spray applied to the upper surface of the nickel sheet to improve the tensile strength with the silicon sheet (S110). In other words, the nickel sheet is first coated with a coating solution such as silicon. At this time, the lower surface of the nickel sheet may be embossed in advance.

계속해서, 니켈시트의 상면에 실리콘시트와의 결합 향상을 위해 점착액을 액상 도포 처리한다(S120). 즉, 전처리 과정으로서 니켈시트를 실리콘 등의 코팅액으로 2차 코팅 처리하는 것이다. Subsequently, in order to improve bonding with the silicon sheet on the upper surface of the nickel sheet, the adhesive liquid is subjected to a liquid coating process (S120). That is, as a pretreatment process, the nickel sheet is subjected to the secondary coating treatment with a coating liquid such as silicon.

마지막으로, 니켈시트의 상면과 실리콘시트의 하면에 점착액을 액상 도포 처리한 뒤 니켈시트와 실리콘시트를 결합한다(S130),(S140). 즉, 니켈시트와 실리콘시트를 실리콘 등의 코팅액으로 3차 코팅 처리한 뒤 합지하는 것이다. 이 때, 상기 실리콘시트의 상면은 미리 엠보싱 처리되어 있을 수 있다. 한편, 이후, 열처리 과정, 오븐 작업 등을 통해 도전성 전극의 제조를 최종적으로 완성하게 된다. Finally, after the pressure-sensitive adhesive liquid is applied to the upper surface of the nickel sheet and the lower surface of the silicon sheet to combine the nickel sheet and the silicon sheet (S130), (S140). That is, the nickel sheet and the silicon sheet are laminated after the third coating treatment with a coating liquid such as silicon. At this time, the upper surface of the silicon sheet may be embossed in advance. On the other hand, after the heat treatment process, the oven work, etc. to finally complete the manufacturing of the conductive electrode.

이하, 본 발명에 따른 도전성 전극의 작용에 대하여 설명하기로 한다. Hereinafter, the operation of the conductive electrode according to the present invention will be described.

본 발명에 따른 도전성 전극을 적용하여 제조된 키패드를 사용하게 되면 탄성지지대에 도전성 전극이 견고하게 부착되어 오랫동안 사용하더라도 박리되지 않았고, 또한 도전성 전극의 니켈층 표면이 엠보싱 처리되어 고정접점과 도전성 전극의 접촉성이 향상되어 접촉불량이 거의 발생되지 않았다. When the keypad manufactured by applying the conductive electrode according to the present invention is used, the conductive electrode is firmly attached to the elastic support and thus does not peel off even after long use, and the nickel layer surface of the conductive electrode is embossed to fix the fixed contact and the conductive electrode. The contactability was improved and hardly caused contact failure.

본 발명에 따른 도전성 전극이 적용되어 제조된 키패드를 복수회 반복 사용하면서 내마모성 테스트를 실시한 결과, 도4에 도시한 바와 같이 도전성 전극의 표면 변화가 그리 크지 않았고, 도전성 전극과 접점단자의 접촉 저항값의 변화가 거의 없었다. As a result of performing abrasion resistance test while repeatedly using the keypad manufactured by applying the conductive electrode according to the present invention, as shown in FIG. 4, the surface change of the conductive electrode was not so large, and the contact resistance value of the conductive electrode and the contact terminal was not significant. There was little change.

또한, 본 발명에 따른 도전성 전극이 적용되어 제조된 키패드를 사용하여 내습성 테스트(온도조건:100℃)를 실시한 결과, 도5에 도시한 바와 같이 단면 변화가 거의 없었고, 도전성 전극과 접점단자의 접촉 저항값의 변화가 거의 없었다. 이와 같이, 본 발명의 도전성 전극은 내마모성, 내습성 모두 우수함을 확인할 수 있었다. In addition, as a result of performing a moisture resistance test (temperature condition: 100 ° C) using a keypad manufactured by applying the conductive electrode according to the present invention, as shown in FIG. There was little change in the contact resistance value. Thus, it was confirmed that the conductive electrode of the present invention is excellent in both wear resistance and moisture resistance.

한편, 본 발명에 따른 러버돔 방식의 키패드용 도전성 전극을 한정된 실시예에 따라 설명하였지만, 본 발명의 범위는 특정 실시예에 한정되는 것은 아니며, 본 발명과 관련하여 통상의 지식을 가진자에게 자명한 범위내에서 여러 가지의 대안, 수정 및 변경하여 실시할 수 있다. Meanwhile, although the conductive electrode for the rubber dome type keypad according to the present invention has been described according to a limited embodiment, the scope of the present invention is not limited to the specific embodiment, which is obvious to those skilled in the art. Various alternatives, modifications, and changes can be made within the scope.

도1은 일반적인 러버돔 방식 키패드의 단면도.1 is a cross-sectional view of a general rubber dome type keypad.

도2는 본 발명에 따른 러버돔 방식의 키패드용 도전성 전극의 단면도. 2 is a cross-sectional view of a conductive electrode for a rubber dome keypad according to the present invention.

도3은 본 발명에 따른 러버돔 방식의 키패드용 도전성 전극 제조방법을 나타내는 흐름도. Figure 3 is a flow chart showing a conductive electrode manufacturing method for a rubber dome keypad according to the present invention.

도4는 본 발명에 따른 러버돔 방식의 키패드용 도전성 전극의 내마모성 테스트 결과를 나타내는 도면. Figure 4 is a view showing the wear resistance test results of the conductive electrode for a rubber dome keypad according to the present invention.

도5는 본 발명에 따른 러버돔 방식의 키패드용 도전성 전극의 내습성 테스트 결과를 나타내는 도면. 5 is a view showing the moisture resistance test results of the conductive electrode for a rubber dome keypad according to the present invention.

*도면의 주요부분에 대한 부호의 설명DESCRIPTION OF THE REFERENCE NUMERALS

110 : 니켈층 111,121 : 엠보싱110: nickel layer 111,121: embossed

120 : 실리콘층 130 : 점착층120: silicon layer 130: adhesive layer

Claims (7)

러버돔 방식의 키패드에 사용되는 도전성 전극으로서, A conductive electrode used for a rubber dome type keypad, 니켈층(110)과; A nickel layer 110; 상기 니켈층(110)의 상면에 적층되는 실리콘층(120)과; A silicon layer 120 stacked on an upper surface of the nickel layer 110; 상기 니켈층(110)과 실리콘층(120)을 결합하기 위해 상기 니켈층(110)과 실리콘층(120)의 사이에 개재되는 점착층(130)을 포함하여 이루어지고, It comprises an adhesive layer 130 interposed between the nickel layer 110 and the silicon layer 120 to couple the nickel layer 110 and the silicon layer 120, 상기 니켈층(110)의 하면에는 엠보싱(111)이 형성되어 있고, Embossing 111 is formed on the lower surface of the nickel layer 110, 상기 실리콘층(120)의 상면에는 엠보싱(121)이 형성되어 있는 것을 특징으로 하는 러버돔 방식의 키패드용 도전성 전극. Embossing 121 is formed on the upper surface of the silicon layer 120, the rubber electrode conductive electrode for keypad type. 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete
KR1020090012290A 2009-02-16 2009-02-16 Conductive electrodes for key pad of rubber dome type KR101029345B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003109449A (en) * 2001-09-28 2003-04-11 Shin Etsu Polymer Co Ltd Contact member for pushbutton switch
KR200400380Y1 (en) * 2005-08-19 2005-11-03 조인셋 주식회사 Key pad for electronic device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003109449A (en) * 2001-09-28 2003-04-11 Shin Etsu Polymer Co Ltd Contact member for pushbutton switch
KR200400380Y1 (en) * 2005-08-19 2005-11-03 조인셋 주식회사 Key pad for electronic device

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